Reference | {Deposit:: STEVEN, T.A., AND OTHERS, 1969, MINERAL RESOURCES OF THE SAN JUAN PRIMITIVE AREA, COLORADO: USGS BULL. 1261-F, P. 67-71, 89-90, 168-171.}{Deposit:: STEVEN, T.A., AND OTHERS, 1974, GEOLOGIC MAP OF THE DURANGO QUADRANGLE, SOUTHWESTERN COLORADO: USGS MAP I-764.}{Deposit:: CROSS, WHITMAN, AND OTHERS, 1905, DESCRIPTION OF THE NEEDLE MOUNTAINS QUADRANGLE, COLORADO: USGS FOLIO 131.}{Deposit:: BLM MINERAL SURVEY 14205}{Deposit:: COLORADO DIV. MINES INF. REPTS., ANNUAL OPERATOR REPTS.; MINE MANAGERS REPTS. 1900, P. 542; 1901, P. 316, 1902, P. 218.}{Deposit:: PROSSER, W.C., 1911, THE BEAR CREEK SYLVANITE CAMP, COLORADO: ENG. MINING JOUR., V. 91, P. 712.}{Production:: COLORADO DIV. MINES INSP. REPT.} |